Furnace.



R. H. SAYRE.

FURNACE.

APPLIOATION FILED MAY 1a, 1908.

Patented Mar. 2, 1909.

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('ltkwnuao R. H. SAYRE.

FURNACE.

ArPLIoATIoN FILED MAY 13, 190B.

Patented Mar. 2, 1909.

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11,11. SAYRE. FURNACE. APPLIUATION FILED MAY 13, 1908.

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UNITE STATES TT FFTQE.

REUBEN H. SAYRE,

GEORGE W.

OF NEW MARTINSVILLE, WEST VIRGINIA, ASSIGNOR OF ONE-HALF TO KOTZEBUE, OF NEW MARTINSVILLE, WEST VIRGINIA.

FURNACE Specification of Letters Patent.

Patented March 2, 1909.

Application filed. May 13, 1908. Serial N 0; 432,676.

To all whom it may concern:

Be it known that I, REUBEN H. SAYRE, a citizen of the United States, residing at New Martinsville, in the county of Wetzel and State of West Virginia, have invented a new and useful Furnace, of which the following is a specification.

This invention relates to improvements in furnaces, and one object is to provide an ash sifting device to be used in conjunction with the grate bars, so that whenever the grate is operated by the shaking lever, the ashes passing through the grate will be caught upon a sifting screen and the finer ashes separated from the coarser ashes, which latter containing unburned materials may be replaced in the fire-box for further burning. The sifter is removably connected to the shaking lever, so that whenever the grate bars are operated by the lever, the sifter will likewise be operated, and may be readily detached from the lever for withdrawal from the ash pit of the furnace, so that ready access may be had to the sifter for the removal of the cleaned ashes.

The body of the furnace as shown in the drawings is in general similar to that shown in Letters Patent No. 759318, granted to me on May 10, 1904, for hot air furnace.

In the aforesaid patent various parts of the furnace are shown as riveted together. This makes it difficult when it is necessary to replace portions of the furnace that may have become damaged or burned out, and, also, increases the cost of manufacture. In the furnace forming the subject matter of the present invention, the body portions and the end portions of the furnace structure are connected together by cars and bolts, and the end plates or castings are so constructed as to receive the corresponding ends of the body portions in recesses or grooves formed in the said end plates with asbestos or other suitable refractory material forming gas tight joints where the body portions enter the grooves.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawings forming a part of this specification, in which drawings,

Figure 1 is a longitudinal section of the furnace. Fig. 2 is a front elevation with parts broken away and in section. Figs. 3, i, and 6 are detail views.

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the draw ings.

The main body of the furnace comprises a front plate 1 and a back plate 2 connected by side plates 3 and a crown plate 4, all similar in construction to these parts of the furnace shown in the aforesaid Letters- Patent.

Around the edges of the front plate 1 and rear plate 2 there is formed a groove or rabbet 5, into which is seated the corresponding edges of the side and top plates 3 and i. The grooves 5 are of such width as to receive a packing 6 of asbestos or other refractory material embracing the edges of the plates 3 and 4: and surrounding the ends thereof. Formed at appropriate points on the edges of the front and back plates are cars 7, ap propriately spaced, and fast on the side plates 3 and 4 in position to match the ears 7 are angle bars 8 held to the plates 3 and 1 by suitable bolts 9. The holes through the ears '7 and 8 coincide so as to permit the passage of drawing-up bolts 10, by means of which the edges of the plates 3 and 4: are firmly seated in the grooves or rabbets 5 with the asbestos lining 6 packed therein.

Within the space between the front and back plates 1 and 2 is located the fire-box which is appropriately lined with fire-brick 11, and below the fire-brick there is located a suitable grate 12, the structure of which forms no part of the present invention, and, therefore, need not be particularly described. In the specific form shown, the grate bars have downwardly extending fingers 13, all connected to a common strip 14;, one end of which is connected to a link 15 extending through the front member of the furnace on the exterior thereof. Suitably pivoted in a bracket 16 fast on the outer face of the front of the furnace is an operating lever 1'7, the shorter end of which is connected by the link 15 to the bar 14, and thereby to the several grate bars, so that upon a suitable manipulation of the lever 17, the grate bars are all rocked simultaneously.

The front of the furnace is provided with the usual fire-box door 18, and clinker door 19, while the usual ash pit door is omitted, and the bottom of the ash pit is occupied by an ash pan 20, the front 21 of which is made sufiiciently expanded to close the oriash pa here are folding dles 4 hai s.

23, by means of which the ash pan may be conveniently carried to a point ofdeposit for the ashes. WVithin the ash pit, above and on eachside of the ash pan, are formed ledges 2l,'a'nd near the front end these ledges carry rollers 25 for the reception of a pan 5 26, the bottom 27 of which is perforated. The pan near its rear end provided on the bottom with rollers 28 adapted to travel on the ledges 24. i

The front of the casing of the furnace coincident with the spaceprovided for the reception of the pan 26, has an opening 29 for the introduction or removal of the said pan, and at the lower edge of this opening there is formed an outwardly projecting lip 30, to which ishinged a door 31, constituting the lower draft door of the furnace, and at the ends of the lip 30 are formed inclined sides :32, so that the door 31 will lie in an inclined position when closed. This door is provided with the usual hinged flap 33,

having its free edge provided with legs 34,

so that when the door 31 is in a horizontal. position and the flap 33 is pendent, the legs 34' will engage the floor upon which the furnace rests. The lip 30 and door 31 when in the :horizontal position constitute a support for the pan 26, so that the latter may be partly withdrawn from the ash pit-in a position to be readily accessible with a shovel.

Hinged to abracket-35 fast onthefront of the furnace is a rock lever '36, one end of which is extended through a suitable opening in the lower end of the shaking lever 17 and the other end of which carries a stud 37 adapted to entera hole or perforation in the handled end 38 of a link 39, pivotally secured at the other end to the front of the sifter pan26, as indicated 40.

Let it be ,as'sinned that a fire is burning in the fire-box and that it is desired to shake down the fire, then the handle 17 is grasped and oscillated in the usual manner about its pivot support 16. This will cause the simultaneous rocking of all of the grate bars 12, and the ashes thus disturbed will fall through the grate until finally arrested by the pan 26. However, this pan is also reciprocating at the same time thegrate bars are being rocked, and the finer ashes will find their way through the perforations in the bottom 27 of the pan and fallintolthe ash pan 20, while the coarser particles of the ashes are retained in the pan 26. When bituminous coal is used inthefurnace, more or less coked, but otherwise unburned coal, finds its way into .the pan 26 :in lumps too uable for reburnin g. After the" fire has been shaken do wn,the pan 26 may be with drawn from the furnace by first unhooking the handle end 38 of the link 39 from en- ,Wit the p 37 and h s handl may be utilized for the purpose of pulling out the pan 2'6from the ash pit. When the pan has been pulled sufficiently out from the furnace to be accessible from the outside, it will be supported upon the door 31, which, in the meantime, has been brought to the horizontal position shown in Fig. '1. Now, the operator may, with a suitable shovel, remove the coked material retained by the pan 26 and again deposit the same in the furnace. This coked material is valuable for banking fires at night, as well as being useful on a :live fire.

The rock lever 36 is located somewhat above the opening for the passage of the pan 26 andthe 'link 39 is normally within an .off-set'-t1 of the opening. In order to close this opening to a sufficient extent to prevent undue draft therethrough, thereis provided a slide 42 having a'forked end adapted to straddle the link 39 when oonnectedtothe rocker arm36. hen it is desired to removethe pan, the slide 42 is moved to one side out'of the path of the link 39, and the latter may then be removed from the pin 3?? and permitted to drop down intothe .ma-in opening 29, so as not to interfere with ltheremoval of the pan 26.

In the aforesaid Letters Patent there is a portion of the furnace which is there designated as the radiator casing and this casing is shown in Figs. 1 and 3 of the present application at 43. In the aforesaid Letters Patent the lower end of this casing is provided with .a rectangular opening connected by a rectangular flanged collar with a similar opening .in the lower part of the back wall of .the .furnace. In the present structure the rectangular collar .is omitted and replaced by two flanged cylindrical collars 4H, spaced apartand connecting the radiator casing with the lower end of the back wall ofthe furnace.

The asbestos packing is used wherever there is danger of coal gasreaching the air drums of the furnace, and wherever a junction is formed between two metal parts where there may be aleak of gas, an asbestos strip, such as shown at 45 in Fig. -5, may be employed.

In the construction of .the furnace, the ends 1 and 2, and any otherportions requiring solidity are made of cast metal, while the sides 3 and top 4; and the outer linings may all-be made .ofsheet metal, such, forfinstance, as sheet steel.

' that is claimed is 1. In a furnace, .the combination with a rocking grate, of a reciprocatory sifting pan below the grate, a shaking lever for the grate, a withdrawing means for the pan fast thereto, and means between the withdrawing means and the shaking lever attachable to and detachable from the said withdrawing means at will without disturbing the connections of the shaking lever with the grate.

2. In a furnace, a shaking grate, a shaking lever therefor exterior to the furnace, and connected to the grate, a shifting pan below the grate, a rocking lever carried by the furnace exterior thereto and connected to the shaking lever, and a link connected at one end to the sifting pan, at the other end formed into a handle and at an intermediate point formed with means for the removable connection of the link wit-h the rocking lever.

3. In a furnace, a shaking grate, a shaking lever therefor exterior to the furnace and connected to the grate, an ash-pit door below the grate, the said furnace having openings through its walls, one opening being coincident with the said ash-pit door and the other opening being below the latter, a sifting pan adapted to be inserted in and removed from the furnace through the ashpit door opening, means for connecting the sifting pan to the shaking lever and disconnecting the same therefrom at will, and an ash-pan insertible in and removable from the furnace through the opening below the ash door opening and constituting a closure for the ash-pit below the ash-pit door when the pan is inserted therein.

In a furnace, a shaking grate, a shaking lever therefor exterior to the furnace, a sifting pan adapted to be inserted in and removed from the furnace below the grate, said furnace having superposed openings through its walls below the grate and leading as my own, I have hereto affixed my signato the ash-pit, a door for the upper one of the said openings movable to form a support for the sifting pan when partially removed from the furnace, a handle for the sifting pan, connecting means between the said handle and the shaking lever attachable to and removable from the sifting pan handle at the furnace exterior thereto and connected to the shaking lever, and removable connections between the sifting pan and the rocking lever.

6. In a furnace, a shaking grate, a shaking lever therefor exterior to the furnace and connected to the grate, a sifting pan below the grate, a rocking lever carried by the furnace exterior thereto and connected to the shaking lever, and removable connections between the sifting pan and the rocking lever, the said removable connec tions constituting a handle for the manipulation of the sifting pan when disconnected from the rocking lever.

7. In a furnace, a shaking grate, a shaking lever therefor, a fixed ledge below the grate, a sifting pan adapted to move on said ledge, connecting means between the shaking lever of the grate and the sifting pan for simultaneous movement of the latter with the grate, and an ash-pan insertible into and removable from the ash-pit below the ledges supporting the sifting pan, the said furnace being provided with an opening through its walls for the insertion and removable of the ash pan.

8. In a furnace, a shaking grate, a shaking lever therefor, ledges below the grate, rollers on said ledges near the front end of the furnace, a sifting pan having a pervious bottom and adapted to the ledges, and rollers on said pan near the rear end thereof.

In testimony that I claim the foregoing ture in the presence of two witnesses.

REUBEN H. SAYRE.

IVitnesses Jas. M. l/VALKER, FRANK SUPPLEMAN. 

